Power supply problem or something else?

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salerhino

salerhino

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Mar 16, 2016
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Hello community of Tom's hardware!
I am begging for your help!
I got new used PC with these specs:
Intel i7-920
Sapphire HD7870 GHz edition (Dual-X fans)
MSI X58 Platinum
4GB Kingston RAM 1333MHz (which works on lower clock it seems)
400 W Chieftec PSU (14A and 15A on 12V1 i 12V2 and exact model is:GPS-400AA-101 A)

So, problem is that my PC runs fine in browsing net, watching and playing music on youtube, but, after 15 minutes in game, I feel that PSU blows out warm air which in my opinion is normal thing it should do right?
But, after those 15 minutes screen starts to shake little bit, so I guess in the end it is my PSU low wattage problem.
It is quality PSU (not top tier but still OK), so I didn't damage anything and I won't play games until I see what is the problem with PC!
Please help me about this, I would really appreciate it!
NOTE: I am also using 1x6 pin + 1 x 1molex to 6pin
Graphic card is 99% good as I saw tests in 3dmark and Furmark and it was working absolutely ok.
 
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notlim981

notlim981

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Hi Salazar. The 7870 is a power hungry card, and as your PSU is a low quality one as you mentioned and it's only 400W, it's strongly recommended that you upgrade it to at least a 500W of a reliable brand such as Corsair or SeaSonic.

 
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salerhino

salerhino

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But is it really problem with PSU?
 
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sizzling

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While I agree you are pushing your luck and risking damaging your whole PC by using that unsuitable PSU I do not think that's the cause of your problem. I just cannot see how a PSU can cause the screen to shake. An insufficient PSU would normally cause instability problems. I think you should get a new PSU regardless but this may be a sign your GPU is dying.
 
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salerhino

salerhino

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Well, after like 3 mins in CS:GO today GPU hit 50 deg. ,fans sped up you know, so I guess they took more V to do that.
I still think it is PSU problem, as minimum is 500 w ?
 
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S

sizzling

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I cant rule out PSU but I have never seen a PSU cause anything like the issue you describe. 500w is fine but equally important is a,PSU of decent quality. A low quality PSU is never ok regardless of wattage.

I have seen failing GPU's cause very similar problems.
 
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salerhino

salerhino

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Drivers seem OK to me, by the way, I am looking through internet for solution, some say 400W simply isn't enough(+ I am using molex to 6 pin), I will also try replugging - reseating GPU.
I saw yesterday before buying GPU that it worked totally fine in 3DMark and Furmark at sellers home in hs PC.
He had better system(PSU also ofc)...
 
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